Road scraper blade mount



March 11, 1958 w, w s 2,825,985

ROAD SCRAPER BLADE MOUNT Filed Jan. 24, 1955 2 Shets-Sheet 1 IN V EN TOR.

Warren fiam'e/ Wwks A 7 TORNE Y,

March 11, 1958 w, ,5, W E S 2,8239% ROAD SCRAPER BLADE MOUNT Filed Jan. 24, '1955 2 Sheeis-Sheet 2 Warren Dan/e/ Weeks ATTORNEY.

727% j IN V EN TOR.

United States Patent ROAD SCRAPER, BLADE MOUNT Application January 24, 1955, Serial No. 483,719 6 Claims. (Cl. 37-179) This invention relates to improvements in road scraper blade mount. The principal objects of this invention are:

First, to provide a scraper blade mount that adjustably supports a scraper blade, relative to a truck and yieldably cushions the blade to cushion the shocks imparted to the blade and reduce their transmission to the truck.

Second, to provide a blade adjusting cylinder for a road scraper which cylinder is yieldably supported to move vertically under the impact of road shocks imparted to the blade.

Other objects and advantages of the mount will be apparent from a consideration of the following description and claims.

Fig. l is a fragmentary perspective view of one end of a scraper blade and a mount therefor embodying the invention.

Fig. 2 is a fragmentary horizontal cross sectional view taken along the plane of the line 22 in Fig. 3.

Fig. 3 is a fragmentary vertical cross sectional view taken along the plane of the line 3 .3 in Fig. 2.

It has heretofore been demonstrated that the scraper blade of a road maintenance truck may be pivoted at its upper edge to the truck and pushed downwardly at the rear of the blade by a fluid actuated cylinder to adjust the'pressure with which the blade presses against the surfaceof the road. It has also been demonstrated that theifluid. actuated cylinder of a scraper mount may be yieldably supported by mounting it on a bracket pivoted to the blade supporting beam and cushioned for relative pivoting movement with respect to the beam. The present invention provides a more independent fully cushioned mounting of the cylinder of a scraper mount.

The drawings illustrate the mounting beam 1 and blade 2 of a road scraper assembly. The beam is of downwardly opening channel section and is adapted to be mounted by means not illustrated on the bottom of the frame of a truck. The blade is pivotally connected as at 3 to the forward edge of the beam. The blade is adapted to be adjusted vertically by the piston rod 4 pivotally connected to the back of the blade at 5. It will be understood that a similar piston rod and associated mechanism is provided at the other end of the blade and beam. The piston rod operates in a fluid actuated cylinder 6 and pressure lines for admitting fluid to the top and bottom of the cylinder are indicated at 7.

The cylinder 6 has oppositely projecting trunnions 8 at its lower ends and these trunnions are rockably received and supported in bearings 9 formed on the side plates 10 of a box frame generally indicated at 11. The box frame is made up of the angled side plates 10 which have outturned flanges 12 along their bottom edges. The side plates are removably connected by end plates 13 bolted to the inturned end flanges 14 of the side plates by the bolts 15.

The box frame 11 is yieldably urged downwardly against the top of the beam 1 by four coil springs 16 that seat on the ends of the flanges 12. The springs 16 abut at their upper ends against cover plates 17 retained on the upper ends of four hold down bolts 18 by the nuts 19. The bolts extend downwardly through the springs and the flanges 12 to the beam 1.

The forward bolts 18 extend through the web of the beam 1 and are secured against upward pull by the nuts or heads 20. The rear bolts extend through the top flanges of angled extension brackets 21 welded as at 22 in transversely spaced relation to the rear of the beam 1.

The rear ends of the brackets are connected by a tie.

frame 11 against the springs 16 and clear of the beam 1. g The trunnions 8 and bearings 9 are desirably centered between the forward and rear springs 16 as well as be: tween the transversely spaced pairs of springs so that the box frame 11 and cylinder move in a direct vertical direction to equally load the several springs. Shocks caused by the blade striking uneven projections in the road surface are thus cushioned by the springs 16 while constant and adjustable pressure is maintained on the blade.

Having thus described the invention what is claimed to be new and what is desired to be secured by Letters Patent is: v

l. A scraper blade mount for a truck comprising, a rigid beam of downwardly facing channel section adapted to be secured in transversely extending rigid relationship under a truck, transversely spaced pairs of brackets through the flanges on each side of each box frame and V anchored by the beam and brackets therebelow, cover plates and nuts on the upper end of each bolt, springs surrounding each bolt and compressed between said cover plates and said flanges, laterally extending bearings centered on said side angles between said springs and opening into said box frames, a pair of cylinders projecting downwardly into said box frames and having trunnions received in said bearings, piston rods projecting from said cylinders downwardly between said brackets, a scraper blade having its upper edge pivoted to the forward edge of said beam, said rods being pivotally connected to said blade below its upper edge, and means for admitting fluid under pressure to the tops and bottoms of said cylinders.

2. A scraper blade mount for a truck comprising, a rigid beam adapted to be secured in transversely extending rigid relationship under a truck, transversely spaced pairs of brackets secured to said beam at each end thereof and projecting rearwardly therefrom, a box frame composed of side angles joined by front and back plates positioned over each end of said beam and having outturned lower flanges overlying said beam and said pairs of brackets, pairs of bolts projecting upwardly through the flanges on each side of each box frame and anchored by the beam and brackets therebelow, cover plates on the upper end of each bolt, springs surrounding each bolt and compressed between said cover plates and said flanges, laterally extending bearings on said side angles between said springs and opening into said box frames, a pair of cylinders projecting downwardly into said box frames and having trunnions received in said bearings, piston rods projecting from said cylinders downwardly between said brackets, a scraper blade having its upper edge pivoted to said beam, said I'Ods being pivotally connected to said blade below its upper edge, and, means for admitting fluid under pressure to the tops and bottoms of said cylinders.

3. A scraper blade mount for a truck comprising, a rigid beam adapted to be secured in transversely extending rigid relationship under a truck, transversely spaced pairs of brackets secured to said beam at each end thereof and projecting rearwardly therefrom, a box frame composed of side angles joined by front and back plates positioned over each end of said beam and having outturned lower flanges overlying; said beam and said pairs of'brackets, bolts projecting upwardly through the flanges on each side of each box. frame, and anchored by the beam, cover plates positioned. over the end of said flanges and anchored by said bolts, springs compressed between said, cover plates, and the ends of said flanges, laterally extending bearings on said side angles, centered between the, springs on each side of the box frames and. opening into said box frames, a pair of cylinders projecting downwardly into said box frames and having trunnions received in said bearings, piston rods projecting from said cylinders downwardly between said brackets, a scraper blade having its upper edge pivoted to said beam, said rods being pivotally connected to. said blade below its upper edge, and means for admitting fluid under pressure to the tops and bottoms of said cylinders.

4. A scraper blade mount for a truck comprising, a rigid beam adapted to be secured in transversely extending rigid relationship under a truck, transversely spaced pairs of brackets of angle section secured to said beam at each end thereof and projecting rearwardly therefrom, a box frame positioned over each end of said beam and. having outturned lower flanges overlying said beam and said pairs of brackets, bolts projecting upwardly through the flanges on each side of each box frame and anchored by the beam, cover plates positioned over said flanges at the, front and back of said box frames and anchored by said bolts, springs compressed between said cover plates and said flanges, laterally extending bearings on the sides of said box frames between said springs and opening into said box frames, a pair of cylinders projecting downwardly into said box frames and having trunnions received in said bearings, piston rods projecting from a said cylinders downwardly between said brackets, a scraper blade having its upper edge pivoted to the forward edge of said beam, said rods being pivotally connected to said blade below its upper edge, and means for admitting fluid under pressure to the tops and bottoms of said cylinders.

5. A scraper blade mount comprising, a mounting beam, a blade pivoted at its upper edge to the forward edge of said beam, a box frame positioned over each end of said beam and projecting rearwardly therebeyond, brackets secured to said beam and projecting rearwardly under the sides of said box frames, rods projecting upwardly from said beam and said brackets alongside of said box frames and held against upward motion, abutments on the upper ends of said rods, springs compressed between said abutments and outturned flanges on the sides of said box frames, fluid actuated cylinders having transversely extending pivotal connections to the sides of said box frames centered. between the springs on the sides of the frames, and piston rods extensible from said cylinders extending downwardly between said brackets and pivotally connected to the back of said blade.

6. A scraper blade mount comprising, a mounting beam, a blade pivoted at its upper edge to saidbeam, at box frame positioned over. each end of 'said'beam and projecting rearwardly therebeyond, brackets secured to said beam and projecting rearwardly under the sidesof said box frames, rods projecting upwardly from said beam and said brackets at the sides of said box frames and held against upward motion, abutments on the upper ends of said rods, springs compressed between said abutments and said box frames,.fluid. actuated cylinders having transversely extending pivotal connections. to the sides of said box frames, and piston rods extensible from said cylinders extending downwardly between said brackets and pivotally connected to the back of said blade.

References Cited in the file of this patent UNITED STATES PATENTS 916,015 Pringle Mar. 23, 1909 1,909,854 Dean May 16, 1933 1,919,260 Schermerhorn July 25, 1933 1,929,799 Weeks Oct. 10,- 1933 2,062,544 Weeks Dec. 1,v 1933 2,284,412 Frentzel etal. May 26', 1942 

